Centrifugal casting machine



June 5, 1923.

J. D. HAMMOND CENTRIFUGAL CASTING MACHINE Filed Dec. 5, 1921 A TTOHME YSPatented June 5, 1923.

Arai" erric- JOSEPH D. HAMMOND, OF JACKSON, MICHIGAN CENTRIFUGAL CASTINGMACHINE.

Application led December 5, 1921.

To all lwhom. 'it may concern Be it known that I, JOSEPH D. HAMMOND, acitizen of the United States, and a resident of Jackson, in the countyof Jackson and State of Michigan, have invented a new and usefulImprovement in Centrifugal Casting Machines, of which the following is afull, clear, and exact description.

`My invention relates to die casting machines .and more particularly todevices of this character in which a molten metal is introduced intoarevolving iask. i

An object of my invention is to provide a device of the characterdescribed in which a' metal is introduced into a flask by a centrifugalforce.

A further object of my ,invention is to provide a device ofthe typedescribed in which a pouring device for introducing metal into the askis actuated by a mechanism rotating at a predetermined speed.

A further object of my invention is to provide a device of the characterdescribed having'means for varying the speed at which the pouringdevicewill be actuated.

A further object of my invention is to provide a device of the typedescribed that is relatively simple in construction and operation, notlikely to get out of order easily, and

thoroughly practical commercially.

Other objects and advantages will appear in the following specification,and the novel features of the invention will be particularly pointed outthe appended claims.

My 'invention is illustrated in the accompanying drawings, forming part'of this ap lication, in whchigure 1 is a side elevation of the device,

Figure 2 is a front elevationi of the same, portions being broken awayand shown in section, and

Figure 3 is an enlarged plan view ofan element of the device.

In carrying out my invention,- I provide a base 1 having mounted thereonav substan- --tially u -shaped frame 2. The latter is secured to thebase by means of a bolt 3 projected through the web of the frame inter-Serial N0. 520,053.

as by means of a pin y9. The gear 8 is in mesh with a gear 10 Lvmountedon a stub shaft 11 ]ournalled in a bearing12 integral with the arm 5.VThe gear 10 is rigidly secured to the shaft 11 and a crank arm 13maintained thereon by means of a bolt 14 or the like provides a meansfor rotating the shaft 11 and the gear 10 to occasion the rotation ofthe shaft 6.

A fly wheel 15 is mounted on the shaft 6 and is formed with a hub 16projecting beyond the inner end of the latter. The y wheel 15 is rigidlysecured to the shaft by a pin 17 or other suitable means. The peripheryof the hub 16 is reduced at 18 anda collar 19 is slidably-"mountedthereon. The reduction of the hub 16 defines an annular shoulder 20which limits the movement of the collar 19 toward thev fly wheel. Thecollar 19 is formed with an annular groove or channel tained in thepositions illustrated in Fig, 2 f

by the action of springs 25-25, each of which connects the correspondingends of parallel `-sleeves 26-26 and 27e-27 mounted on pins 28-28 and29-29 that extend laterally in opposite directions from the bell cranklevers 22-22 at the outer ends thereof. The collar 19 is thus maintainedagainst the shoulder 2O on account of the thrust of the inner ends`- ofthe belt crank levers 22--22` thereagainst. y

A driven shaft 30 is journalled in a bearing 31 integral with the arm 4at its upper end and the inner end thereof is arranged to rest withinthe bore of the hub 16, being axially alined with the shaft 6. A clutchcollar 32 is mounted on theshaft 30 between the bearin 31 and theadjacent end of the hub 16 an is securedito the shaft 31 to rotatetherewith by a pin 33. The clutch collar 32 which is best seen in Fig. 3of the drawings is formed with an annular groove 34 in its peripheralwall adjacent to the outer end thereof and with a recess 35 in itsperipheral wall, as shown. An opening 36 extends from the inner wall ofthe clutch collar to the recess 35 and a slidable abutment 37 disposedin the recess 35 is arranged to project from the opening 36 intoargalined recess 39 in the adjacent end of the hub 16, thereby lockingthe clutch collar 32 to the hub 16. A spring 40 disposed within therecess 35 between the slidable abutment 37 and the adjacent wall of theclutch collar 32 re-acts against the former to maintain the same 1nengagement with the alined recess or socket 39. The slidable clutchmember 37 is formed with a vertical extension ,40' intermediate the endthereof, which provides a stop for limiting the movement of the slidableabutment toward the hub 16. An operating handle 41 is rigidly secured at42 to the extension 40 and is disposed in a recess 38 so that theabutment*k 37 may be withdrawn from the socket 39, thereby disengagingthe clutch collar 32 from the hub 16.

The bearing 31 has an integral upstanding lug 43 and a locking arm 44 ispivoted at one endl as at 45 to the lug. The free end of the locking arm44 bears upon an inclined annular cam surface 46 of the slidable collar19 and a pin or detent 47 depending from the locking arm 44 normallytravels in the annular groove 34 in the periphery of the clutch collar32 without engaging with the latter. When the slidable. abutment 37 ismoved inwardly against the compression of the spring 40, the pin 47 willbe moved from the annular groove 34 into engagement with an opening 48in the upper surface of the handle 41 so that the abutment 37 will beheld out of engagement with the socket 39. The driven shaft 30 has aspacing collar 49 secured thereon by means of a pin 50 or the like and atransverse beam 51 is intermediately secured as by means-of acountersunk bolt 52 to the end of the shaft 30. The beam 51 supports apouring device 52. The latter is mounted on a holder 53' that may beslidable moved along the beam. A counterweight 54 is mounted on the beamand may be moved therealong to balance the weight of the pouring device52 and that of a flask 55 that is held in operative engagement with thepouring device by a clamping member 56. The latter is slidable on thebeam 51 and -may be secured in adjusted position thereon by means of aset screw 57. An adjusting screw 58 carried by the clamping member 56maybe operated to permit removal of the flask 55. A set screw 59provides a means for maintaining the counterweight 54 in adjustedposition along the beam 51.

From the foregoing description of the various parts of the device, theoperation there.- of may be readily understood. The handle or trigger 41is grasped and manipulated to occasion the engagement of the locking pin47 with the recess 48, whereby the abutment 37 is maintained out ofengagement with the socket 39 and rotation of the shaft 6 and of the hub16 will not occasion a rotation of the shaft 30. Consequently, the beam51 carrying the mold and the pouring device will at this time remain ininitial position. The rotation of the shaft 6 is effected by operationof the crank arm 13. The ratio of the gears 10 and 8 is such that arelatively high speed may be obtained by manual operation of the crankarm 13. As the speed of rotation of the shaft 6 and of the ily wheel 15is increased, the parallel arms of the bell crank levers 22-22 will moveapart against the tension of the springs 25-2 5, thereby moving theslidable collar 18 toward the clutch collar 32. The locking arm 44 willbe moved upwardly on account of the engagement of the free end thereofwith the cam surface 46 and the pin 47 will thereupon be moved out ofengagement with the recess 48. The abutment 37 willthen be moved by theaction of the spring 40 into the socket 39 in the adjacent end of thehub 16, thereby locking the clutch collar` 32 to the hub 16. Obviously,the shaft 31 will now be driven and the beam 51 will be rotated aboutthe axis of the shaft 30. A molten metal in the pouring device 52' willbe thrown outwardly through the spout 60 of the latter by centrifugalforce into the open communicating end of the mold 55 in which the metalis to be cast. The beam 51 is not rotated until a predetermined speedhas been attained and consequently the force acting on the metal whenthe beam is revolved will be suiicient to insure the forniation of acompact mold. The speed at which the beam 51 will be actuated may bevaried by varying the tension on the springs 25-25.

While I have shown a device arranged to be operated manually, it isobvious that the driving force may be applied by power means and thatmany other modifications and adaptations of the form of the deviceillustrated in the accompanying drawing may be made without departingfrom Gliespirit and scope of the invention as set forth in the foregoingand outlined more particularly in the appended claims.

I claim:

1. A device of the character described comprising a pouringinstrumentality adapted to normally hold a molten metal, a flask adaptedto receive metal from the pouring instrumentality, a beam, means foradjustably securing the pouring instrumentality to the beam, means foradjustably securing the flask -to the beam in adjusted position relativeto the pouring instrumentality, a shaft connecting at its outer end'with the beam intermediate the length of the latter, a shaft for drivingthe first named shaft, means for rotatably supporting the first namedshaft and the drive shaft in co-axial alinement, cooperating meanscarried by said shafts at their adjacent ends for causing the operativeengagement of said first named shaft by the drive shaft, and means forrotating the drive Shaft.

- the beam, means or ad'ustably securing the flask to the beam in ajusted position relative to the pouring instrumentality, a shaftconnecting at its outer end with the beam intermediate the length of thelatter, a shaft for driving Ithe first named shaft, means for rotatablysupporting the first named shaft and the drive shaft in co-axialalinement, cooperating means carried by said shafts at their adjacentends for causing the operative engagement of said first named shaft bythe drive shaft, means carried by said supporting means and arranged toengage with the clutch means carried by the first named shaft tonormally lock the latter out of operative engagement with the driveshaft. spring means arranged to urge the clutch means carried by thefirst named shaft into operative engagement with the clutch meanscarried by the drive shaft, a governor controlled device, arranged ltobe operated by the drive shaft and to actuate saidlocking means topermit movement of the clutch, means carried by the first named shaftinto operative engagement with t'he cooperating clutch means carried bythe drive shaft, and means for rotating the drive shaft.

3. A device of the type, described comprsing a frame, a shaft rotatablycarried by said frame, a rod rigidly secured at its mid point to saidshaft, a fiask and a crucible adjustably carried by -said rod and beingdisposed adjacent -to one end of said rod, -a counterweight carried bythe other end of said rod, a second shaft rotatably carried -by saidframe,'manually operated' means for rotating said s econd named shaft,and automatic means for effecting the engagement of said 'first namedshaft with said second named shaft when said second named shaft hasattained a 'predetermined speed.

4. A'v device of the character, described comprising a frame, a shaftrotatably carried by said frame, a rod rigidly Vsecured at its mid pointto said shaft, a flask and a crucible adjustably carried by said rodand' being disposed adjacent to one end' of said rod, a counterweightadjust-ably 'carried by the other end of said rod, a second shaft rotatably carried by said frame, a fiy Wheel carried by said second namedshaft, manually operated means for actuating said second named shaft, agovernor carried by said Wheel 4and being adapted to effect theengagement of said second named shaft with said first named shaft whensaid second named shaft has attained a predetermined speed.

JOSEPH D. HAMMOND.

